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3 years ago

ਨਿਰਭਰ ਕਰਦੀਇਬਾਣੀ ਸਰੀਰਜ ਸਮੱਰਥਾ ਜਿਹੜਾ ਕਿੰ- ਉਨ ਬਾਦ ਤੇ

Physics

1 answer:

kipiarov [429]3 years ago

6 0

Answer:

I can't understand

Explanation:

But if you have a english translator I can help

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In trampoline competitions, a good jump is one that lasts about 1.8 seconds. (A) How high can an athlete who stays in the air 1.

KonstantinChe [14]

Answer:

3.97305 m

Explanation:

a = Acceleration due to gravity = 9.81 m/s²

If a jump lasts for 1.8 seconds this means that from the moment when the person leaves the ground till the person touches the ground again it takes 1.8 seconds. So, maximum height reached will be at half the time of the jump i.e., 0.9 seconds.

u = Initial velocity = 0

Equation of motion

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=0t+\frac{1}{2}9.81\times 0.9^2\\\Rightarrow s=3.97305\ m$

So, height of the jump is 3.97305 m.

4 0

3 years ago

A cubic box has a 0.6 cubic decimetre side. Find the mass of air in the box in gram. (1 Liter of air has a mass of 1.3 g).

morpeh [17]

Answer:

The mass of air in the box is 0.78 grams.

Explanation:

A litre equals a cubic decimetre. By definition of density ( $\rho$ ), in grams per litre, we calculate the mass of air inside the cube ( $m$ ), in grams:

$m = \rho \cdot V$ (1)

Where $V$ is the volume occupied by air within the cube, in litres.

If we know that $V = 0.6\,L$ and $\rho = 1.3\,\frac{g}{L}$ , then the mass of air is:

$m = \left(1.3\,\frac{g}{L} \right)\cdot (0.6\,L)$

$m = 0.78\,g$

The mass of air in the box is 0.78 grams.

4 0

2 years ago

An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid X and 581 km from the center of asteroid

mariarad [96]

Answer:

0.05806

Explanation:

$m_x$ = Mass of asteroid x

$m_y$ = Mass of asteroid y

$r_x$ = Distance from asteroid x = 140 km

$r_y$ = Distance from asteroid y = 581 km

m = Mass of asteroid

Force of gravity between asteroid x and the astronaut

$F_1=\frac{Gm_xm}{r_x^2}\\\Rightarrow F_1=\frac{Gm_xm}{140^2}$

Force of gravity between asteroid x and the astronaut

$F_2=\frac{Gm_ym}{r_y^2}\\\Rightarrow F_2=\frac{Gm_ym}{581^2}$

Here these two forces are equal as they are in equilibrium

$\frac{Gm_xm}{140^2}=\frac{Gm_ym}{581^2}\\\Rightarrow \frac{m_x}{140^2}=\frac{m_y}{581^2}\\\Rightarrow \frac{m_x}{m_y}=\frac{140^2}{581^2}\\\Rightarrow \frac{m_x}{m_y}=0.05806$

The ratio of the masses of the asteroid is 0.05806

4 0

3 years ago

An Alien ship is 500m above the ground and moving with a constant velocity of 150m/s upward. How high above the ground is the sh

Liula [17]

Answer:

1250m

Explanation:

Since it's a Constant Velocity, and not an acceleration rate, simple math. 150*5=750+500=1250m.

3 0

3 years ago

True/False

Alborosie

Answer:

True

Explanation:

Scientists and professionals in health sciences are invited to participate in congresses, conferences and events. Communications to conferences can be of different types, but it is always necessary to draw a table with the contents that you want to present.

Due to the rise and importance of conferences in recent years, scientists and scientific societies that provoke conferences have gained greater knowledge of the importance of defining their publications, so that the problems related to these issues are becoming smaller .

It is important to know how to write the communication and if the conference proceedings or reports will be considered as primary publication, then it is recommended to prepare the manuscript in the same style as the journal articles. For this it is recommended to use the same method.

6 0

3 years ago

ਨਿਰਭਰ ਕਰਦੀਇਬਾਣੀ ਸਰੀਰਜ ਸਮੱਰਥਾ ਜਿਹੜਾ ਕਿੰ- ਉਨ ਬਾਦ ਤੇ​

ਨਿਰਭਰ ਕਰਦੀਇਬਾਣੀ ਸਰੀਰਜ ਸਮੱਰਥਾ ਜਿਹੜਾ ਕਿੰ- ਉਨ ਬਾਦ ਤੇ